Hey guys pls help asap ​

Find all the values of x that make 0.1x + 0.25(102 - x) < 17.10 true.

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers

X+ y = 5 ; x - y =3 solve using linear combination